---- The full paper has open access here

Zhang, S.-R., Erickson, P. J., Coster, A. J., Rideout, W., Vierinen, J., Jonah, O., & Goncharenko, L. P. (2019). Subauroral and polar traveling ionospheric disturbances during the 7‐9 September 2017 storms. Space Weather, 2019SW002325. http://doi.org/10.1029/2019SW002325